Τίτλος:
Changes of presaccadic cortical activity when performing horizontal,
visually guided saccades
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
When a visually guided saccade task is running, the presaccadic
potential obtained in the initial period of the task differs from those
obtained later, while the subject’s oculomotor performance remains
unaffected. These time-related changes of cortical activity consist both
of an overall decreasing electrical activity as well as a selective one
over certain cortical areas. The generalised reduced activity already
described in earlier studies is considered as an unspecified effect such
as fatigue or decreased motivation. On the contrary, the pronounced
selective changes of cortical activity obtained over cortical areas such
as the centro-parietal and frontal cortices, should be related with more
specific, that is, visuomotor function. We assume that at the beginning
of the task the performance of the saccade needs the activation of
several cortical areas but later on the same oculomotor plan runs
sufficiently under subcortical control. (C) 1997 Elsevier Science
Ireland Ltd.
Συγγραφείς:
Evdokimidis, I
Constantinidis, TS
Gourtzelidis, P and
Liakopoulos, D
Papageorgiou, C
Περιοδικό:
Electroencephalography and Clinical Neurophysiology
Εκδότης:
ELSEVIER SCI IRELAND LTD
Λέξεις-κλειδιά:
saccade; slow potentials; motivation; learning
DOI:
10.1016/S0013-4694(96)96583-2
